1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

What's a reasonable lifetime for a hub bearing?

Discussion in 'Ford Trucks' started by Mathe, Dec 30, 2008.

  1. Mathe

    Mathe Junior Member
    Messages: 8

    Alright guys, early '99 (11/98 build date) F-250, 7.3L, 4WD, RABS, Blizzard 800HD, 89,xxx miles. How long should a hub bearing in the front last? It seems like the driver's side is going out, but I can't say for sure. It doesn't hum like I'm used to, it clunks going over bumps like the bearings have play in them. When slowly turning left under slight positive throttle, low RPM, it rarely, but sometimes, sounds like a tire is hitting a mudflap, but it isn't.

    What are your thoughts? Is this the bearing or something else that isn't occuring to me?

    Also, does anyone have a part number for this? I tried a Timken 515022 using the build date and RABS at Auto Zone; it was the wrong one, must be for a light duty F-250 and not Super Duty. I have a Timken 515021 now that appears to be the same but with slightly different dimensions in places. It fits the knuckle fine though.

    Any thoughts are greatly appreciated.
  2. stroker79

    stroker79 2000 Club Member
    Messages: 2,802

    I replaced mine at 90,000 as well, I thought it was a little early but having a plow on it since new i can see the extra wear. I had to do ujoints and balljoints too. made it cheaper on labor since everything was apart anyway.
  3. wildbroncobilly

    wildbroncobilly Member
    Messages: 45

    Are you sure it's your unit bearing it could just be a loose shock or a sway bar end link
  4. stroker79

    stroker79 2000 Club Member
    Messages: 2,802

  5. stumper1620

    stumper1620 Senior Member
    Messages: 222

    Probably not your bearing.... I thought my drivers side was going.... it turns out its the hub is shot... manually lock your hubs and I'll bet your noise goes away.
  6. Mathe

    Mathe Junior Member
    Messages: 8

    I tried that - it makes fewer noises but doesn't make them go away.

    The shocks appear to be good, but I might replace them anyway because of their age. I didn't think of the sway bar, I'll take a look at that and see what's happening. I'll also check out the track bar mounts. The guy that had it before me put a 2" add-a-leaf in, which included an adapter for the track bar mount on the passenger side.

    I put the 515021 in, it seems to me there are fewer noises but some are still there, like the "mudflap" sound, rare but not gone. The old bearing had grease on the back of the unit in a ring, about the size of the seal on the knuckle, like the grease had been coming out of the bearing anyway. The small needle bearing that rides on the shaft was bone-dry.

    I'll check the rest out later today. Thanks-
    Last edited: Dec 30, 2008
  7. KubotaJr

    KubotaJr Senior Member
    Messages: 328

    My drivers side hub was shot at 90,000 miles also, so i had it replaced. But the noise and clunking ended up being the sway bar bushings.
  8. cocco78

    cocco78 Senior Member
    Messages: 158

    I had to replace the driverside hub on my 2001 F250 at 60k miles. Easy way to check is to jack it up so that tire is off the ground, put your hands at 12 and 6 oclock on the wheel and try to shake it back and forth. If it moves at all its bad... I couldn't hear mine go bad over the powerstroke, like you can usually hear the hum or growl as it starts to go. Or Feel it, it will be noticably hotter than the other side..

    CARDOCTOR PlowSite.com Addict
    Messages: 1,312

    swaybar links and or swaybar bushings

  10. Mathe

    Mathe Junior Member
    Messages: 8

    Seems like it's sway bar related to me. Project for this weekend. Thanks guys.
  11. toyman

    toyman Senior Member
    Messages: 111

    Check the ball joints. Mine made a bunch of noise. Are the tires wearing excessively on the inside?

    Check out www.autopartsdirecttoyou.info I found these guys doing a search for parts for my truck. Lifetime guarantee on the parts. They have a kit that will update the old style bearing to the new style bearing. Everyhwere I searched wanted $500+ for each bearing assembly. I bought the upgrade, rotors, studs, ball joints, and axle joints for around $700.

    Good luck, let us know what the noise is.

  12. Mathe

    Mathe Junior Member
    Messages: 8

    Tires have no strange wear patterns, balljoints are tight as prom night and are newer MOOG's. I have a set of sway bar link bushings on order and won't be in until Tuesday. Does the track bar have replaceable bushings? How about the mounts for the sway bar to the axle; is there any rubber in there that can be replaced?
  13. toyman

    toyman Senior Member
    Messages: 111

    ALL of those bushings can repaced with poly bushings.

    Let us know if that fixes your noise.
  14. Mathe

    Mathe Junior Member
    Messages: 8

    New bushings on the sway bar mounts and links and the noises are gone. I still, however, get a few when turning at times, so I have poly bushings for the track bar on order. I'm figuring it's rattling when I go around left turns and putting the bar in tension. Either way, I'm happy with what the problem was, how easy it was to fix, and how cheap. Thanks for your suggestions, guys!